Ever heard of The United Nations? Obviously the US is going to give the most money, because we have the most money. Who pays more in taxes a doctor or a taxi driver? That 15 billion is only 3 billion each year, over a 5 year period. This is a drop in the bucket. And this 15 billion is only going to Africa, Caribbean, and Vietnam. The rest of the worlds AIDS will continue to flourish. Just as it has hit new highs in 2003.
Anyway, to answer your question. They dont have the infrastructure because they are blacks. And blacks are stupid. That is also why they are starving to death. Its not because they live in the arrid desert. Its because they are blacks. And blacks are stupid.